The Ultimate TRUE TIRE SIZE Database

Mickey Thompson MTZ P3
Size Stated on Sidewall: 35x12.50R15
Actual Height: 33" with ZERO Miles

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So going off this thread, is it better to buy the stated size you're looking for, or the measured size? Has anyone been looking for 37s, measured and saw they were smaller, and gone up to 39s or something, as an example?
 
caminton said:
So going off this thread, is it better to buy the stated size you're looking for, or the measured size? Has anyone been looking for 37s, measured and saw they were smaller, and gone up to 39s or something, as an example?
Click to expand...

I'm sure you could. But I think most people just call it what it is printed on the sidewall. When you hear someone say 37s, that's what's printed in the text on the tires. I've found the manufacturer listed diameters/specs to be fairly accurate but that's with the tire off the car (no weight on it).

coop.jpg

EDIT: Picture added.
 
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caminton said:
So going off this thread, is it better to buy the stated size you're looking for, or the measured size? Has anyone been looking for 37s, measured and saw they were smaller, and gone up to 39s or something, as an example?
Click to expand...

Most people go off advertised size to select their tires. There are a lot of variables that determine tire size, such as lift, axles, gears, etc.
 
1. Cooper STT (originals, non-Pro) 35x12.50x17

2. 32 7/8" w/15000ish miles at 30 psi

ImageUploadedByWAYALIFE1472338069.643502.jpg


1. Cooper ST 35x12.50x17

2. 33.5" w/about 100 miles at 30 psi

ImageUploadedByWAYALIFE1472338219.117268.jpg

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"On loan" from Discount Tire awaiting Nitto's
 
One thing to keep in mind too though is that ties are measured at factory using a 10 inch wide wheel in the most cases for anything 12 wide and up. Also at 40 psi. And I bet if you put it on a 10 inch wide wheel air to forty and stand it up on the ground it is exactly what they show on the factory spec sheet.
 
1. Maxxis RazrMT 35X12.50-17 @ 30psi, zero miles.

2. 34" even

3. KMC 229

Side note, these are not installed on the jeep at this time. This is mounted and aired free standing.

ImageUploadedByWAYALIFE1475161567.064900.jpg
 
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Federal Couragia

Just found this thread -- good stuff here. Thought I'd add mine:

Federal Couragia 275x65R18
I'm saying 30 5/8
30 psi
7,000 miles on these

tire height.jpg
 
Cooper STT Pro 295/70/17
40PSI (straight from discount tire i havent adjusted them yet)
10 miles from driving home
mounted on ATX 17x9s and a bone stock light 2 dr

looks like right at 32 1/8"

pic was too large to upload :doh:
 
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